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<html lang="en">
<head>
  <meta charset="UTF-8">
  <meta http-equiv="X-UA-Compatible" content="IE=edge">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>Document</title>
  <style>
    * {
      margin: 0;
      padding: 0;
    }
    .box {
      /*
        在 375 的屏幕上 100vw等价于375px 1vw等价于3.75px 3.75px 等价于 1vw
        px换算思路(px / 设计稿宽度)
        100px 尺寸可以换算成 26.6667vw 
        100px / 3.75 = 26.6667vw
      */
      width: calc(100vw / 3.75);
      height: calc(100vw / 3.75);
      background-color: orange;
    }
    span {
      font-size: calc(14vw / 3.75);
    }
  </style>
</head>
<body>
  <div class="box"></div>
  <span>375设计稿中div宽高234.375px 文字font-size=32.8125px</span>
</body>
</html>
